Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An information processing method, wherein the method comprises: dividing preamble sequences in a access cell into two parts, wherein a first part of the preamble sequences is dedicated preamble codes selected for access of a first type of user equipment (UE), and a second part of the preamble sequences are preamble codes selected for access of a second type of UE; an evolved nodeB (eNodeB) sending information of a physical random access channel (PRACH) resource configured for a UE to the UE through a physical downlink shared channel (PDSCH) indicated by a downlink control channel; the eNodeB receiving a preamble sequence which is sent by the UE and selected in the first part of the preamble sequences by the UE: according to the preamble sequence, the eNodeB distinguishing a type of the UE sending the preamble sequence: wherein the downlink control channel is an enhanced physical downlink control channel (ePDCCH); or information carried in a physical broadcast channel (PBCH) indicates that the downlink control channel is the ePDCCH or a physical downlink control channel; or, when a Long Term Evolution (LTE) system bandwidth is less than or equal to a reception bandwidth of the UE, the downlink control channel is a physical downlink control channel, when the LTE system bandwidth is greater than the reception bandwidth of the UE, the downlink control channel is the ePDCCH.
In an LTE system, a method for processing information involves dividing random access preamble sequences into two groups: one for a new UE type and another for legacy UEs. The eNodeB transmits physical random access channel (PRACH) resource information to the UE via a physical downlink shared channel (PDSCH), the PDSCH being indicated by a downlink control channel. When the UE transmits a preamble from the first group, the eNodeB can determine the UE type. The downlink control channel is either an enhanced physical downlink control channel (ePDCCH), is indicated by the PBCH to be ePDCCH or PDCCH, or dynamically switches between PDCCH (LTE bandwidth <= UE bandwidth) and ePDCCH (LTE bandwidth > UE bandwidth).
2. The method of claim 1 , wherein the method further comprises: after receiving the same random access preamble sequence sent by a plurality of the UEs, the eNodeB returning a contention resolution message to a UE accessing successfully through the PDSCH indicated by the downlink control channel.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, further includes a contention resolution process. If multiple UEs send the same random access preamble sequence, the eNodeB sends a contention resolution message via the PDSCH, indicated by the downlink control channel, to the UE that successfully gains access. This resolves contention when multiple UEs attempt random access simultaneously. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
3. The method of claim 1 , wherein: the position of a time domain orthogonal frequency division multiplexing (OFDM) symbol of the ePDCCH in a subframe is a fixed position.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, includes a characteristic of the ePDCCH. The time-domain position of the orthogonal frequency division multiplexing (OFDM) symbol within a subframe for the ePDCCH is at a fixed, predetermined location. This allows the UE to reliably locate and decode the ePDCCH without needing to search across the entire subframe. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
4. The method of claim 1 , wherein: before the eNodeB sends PRACH resources configured for a UE to the UE, the method further comprises: the eNodeB configuring the PRACH resources for the UE.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, includes a preliminary PRACH resource configuration step. Prior to sending PRACH resource information to the UE, the eNodeB first configures these PRACH resources for the UE. This configuration includes specifying the time, frequency, and preamble sequence resources that the UE can use for random access. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
5. The method of claim 4 , wherein: when the downlink control channel is the ePDCCH, the eNodeB configuring the PRACH resources for the UE comprises: the eNodeB configuring dedicated PRACH resources for the UE, wherein the dedicated PRACH resources comprise frequency-domain resources, time-domain resources and preamble sequence resources; the eNodeB configuring parts of PRACH resources used by an ordinary legacy R8/9/10 user equipment (OL UE) for the UE; or the eNodeB configuring all of PRACH resources used by the OL UE for the UE.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, involves configuring PRACH resources for the UE before sending PRACH resources to the UE. When using the ePDCCH as the downlink control channel, configuring PRACH resources involves three options: 1) assigning dedicated PRACH resources (frequency, time, preamble sequence); 2) allocating a subset of PRACH resources used by legacy UEs for the new UE; or 3) allocating all PRACH resources of the legacy UEs to the new UE. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
6. The method of claim 1 , wherein: the position of the PDSCH is indicated by the ePDCCH in a present frame or across frames.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, involves the PDSCH position being indicated by the ePDCCH. The location of the PDSCH, which carries data for the UE, can be signaled by the ePDCCH either within the same frame or across different frames (cross-frame scheduling). This allows for flexibility in scheduling downlink data transmissions. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
7. The method of claim 5 , wherein: the eNodeB sends the downlink control information after receiving a random access preamble sequence sent by the UE, comprising: if the PRACH resources are dedicated PRACH resources configured for the UE, after receiving the random access preamble sequence on the PRACH resources, the eNodeB sending an ePDCCH scrambled with a random access Radio Network Temporary Identifier (RA-RNTI) on a predefined reception bandwidth of the UE; if the PRACH resources are parts of the PRACH resources used by the OL UE and configured for the UE, after receiving the random access preamble sequence on the PRACH resources, the eNodeB sending the ePDCCH scrambled with the RA-RNTI and a PDCCH scrambled with the RA-RNTI when the random access preamble sequence is shared by the UE and the OL UE, and sending the PDCCH scrambled by the RA-RNTI when the random access preamble sequence is exclusively used by the OL UE; if the PRACH resources are all of the PRACH resources used by the OL UE and configured for the UE, then after receiving the random access preamble sequence on the PRACH resources, the eNodeB sending the ePDCCH scrambled with the RA-RNTI and the PDCCH scrambled with the RA-RNTI.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, defines how the eNodeB sends downlink control information after receiving a random access preamble. If the PRACH resources are dedicated, the eNodeB sends an ePDCCH scrambled with RA-RNTI within a UE-specific bandwidth. If the PRACH resources are a subset of legacy resources, the eNodeB sends both ePDCCH and PDCCH scrambled with RA-RNTI if the preamble is shared, or only PDCCH scrambled with RA-RNTI if the preamble is exclusive. If the PRACH resources are all legacy resources, the eNodeB sends both ePDCCH and PDCCH scrambled with RA-RNTI.
8. A method for user equipment randomly accessing a Long Term Evolution (LTE) system, wherein the method comprises: dividing preamble sequences in a access cell into two parts, wherein a first part of the preamble sequences is dedicated preamble codes selected for access of a first type of user equipment (UE), and a second part of the preamble sequences are preamble codes selected for access of a second type of UE; the UE receiving Physical random access channel (PRACH) resource configuration information sent by an evolved nodeB (eNodeB) through a physical downlink shared channel (PDSCH) indicated by a downlink control channel; after receiving the PRACH resource, the UE selecting a preamble sequence in the first part of the preamble sequences, and transmitting the preamble sequence to the eNodeB on the PRACH resources indicated by the PRACH resource configuration information; wherein according to the received preamble sequence the eNodeB distinguishes a type of the UE sending the preamble sequence: the UE using a random access radio network temporary identifier (RA-RNTI) to monitor the downlink control channel, reading information carried in a random access response (RAR) sent by the eNodeB from a PDSCH indicated by the monitored downlink control channel; the UE sending uplink data to the eNodeB through a physical uplink shared channel (PUSCH) according to the information carried in the RAR; wherein the downlink control channel is an enhanced physical downlink control channel (ePDCCH); or, after the UE receives a physical broadcast channel (PBCH), information carried by the PBCH is used to determine that the downlink control channel is the ePDCCH or a physical downlink control channel; alternatively, the UE obtains a system bandwidth, when the long-term evolution (LTE) system bandwidth is less than or equal to a reception bandwidth of the UE, the downlink control channel is a physical downlink control channel, when the LTE system bandwidth is greater than the reception bandwidth of the UE, the downlink control channel is the ePDCCH.
In an LTE system, a UE randomly accesses the network by first dividing preamble sequences into two groups: one for a new UE type and another for legacy UEs. The UE receives PRACH resource configuration from the eNodeB via a PDSCH indicated by a downlink control channel. It then selects a preamble sequence from the first group and transmits it on the configured PRACH resources. The eNodeB determines the UE type from the received preamble. The UE monitors the downlink control channel using RA-RNTI and reads the RAR from the PDSCH. Finally, it sends uplink data via PUSCH according to the RAR information. The downlink control channel is either ePDCCH, determined by PBCH to be ePDCCH or PDCCH, or dynamically switches based on LTE and UE bandwidths.
9. The method of claim 8 , wherein: after the UE sends the uplink data to the eNodeB through the PUSCH, the method further comprises: the UE taking a temporary cell radio network temporary identifier (C-RNTI) to monitor the downlink control channel, reading a contention resolution message from the PDSCH indicated by the monitored downlink control channel, and judging whether the random access of the UE is successful or not according to the contention resolution message, and upgrading the temporary C-RNTI to a C-RNTI if the access is successful.
The UE random access method, where preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, further involves contention resolution. After sending uplink data, the UE monitors the downlink control channel using a temporary C-RNTI. It reads a contention resolution message from the PDSCH and determines if its random access was successful. If successful, the temporary C-RNTI is upgraded to a permanent C-RNTI. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
10. An evolved NodeB, wherein preamble sequences in a access cell is divided into two parts, wherein a first part of the preamble sequences is dedicated preamble codes selected for access of a first type of user equipment (UE), and a second part of the preamble sequences are preamble codes selected for access of a second type of UE; wherein the evolved NodeB comprises: a sending module, which is configured to send physical random access channel (PRACH) resource information configured for a UE to the UE through a physical downlink shared channel (PDSCH) indicated by a downlink control channel; and a processing module, which is configured to send downlink control information and a random access response (RAR) after receiving a random access preamble sequence sent by the UE, receive a preamble sequence which is sent by the UE and selected in the first part of the preamble sequences by the UE, and according to the preamble sequence, distinguish a type of the UE sending the preamble sequence; wherein the downlink control channel is an enhanced physical downlink control channel (ePDCCH); or, information carried in a physical broadcast channel (PBCH) indicates that the downlink control channel is the ePDCCH or a physical downlink control channel; or, when a Long Term Evolution (LTE) system bandwidth is less than or equal to a reception bandwidth of the UE, the downlink control channel is a physical downlink control channel, when the LTE system bandwidth is greater than the reception bandwidth of the UE, the downlink control channel is the ePDCCH.
An evolved NodeB (eNodeB) for an LTE system, where random access preamble sequences are divided into two parts (one for a first UE type, another for a second UE type), includes a sending module and a processing module. The sending module transmits PRACH resource information to a UE via a PDSCH indicated by a downlink control channel. The processing module receives a preamble sequence from the UE, determines the UE type, and sends downlink control information and a random access response (RAR). The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
11. The evolved NodeB of claim 10 , wherein: the sending module is further configured to, after receiving the same random access preamble sequence sent by a plurality of the UEs, return a contention resolution message to a UE accessing successfully through the PDSCH indicated by the downlink control channel.
The eNodeB, which divides preamble sequences into two parts for different UE types, distinguishes UE type based on received preamble, and sends PRACH resource information and RAR, further handles contention. The sending module returns a contention resolution message via the PDSCH indicated by the downlink control channel to a UE that successfully accesses the network after multiple UEs send the same preamble. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
12. The evolved NodeB of claim 10 , wherein the evolved NodeB further comprises: a configuring module, which is configured to configure the PRACH resources for the UE, and send the PRACH resources to the sending module.
The eNodeB, which divides preamble sequences into two parts for different UE types, distinguishes UE type based on received preamble, and sends PRACH resource information and RAR, includes a PRACH resource configuration module. This configuration module configures the PRACH resources for the UE and then sends this configuration information to the sending module for transmission to the UE. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
13. The evolved NodeB of claim 12 , wherein: the configuring module is configured to: configure dedicated PRACH resources for the UE, wherein the dedicated PRACH resources comprise frequency-domain resources, time-domain resources and preamble sequence resources; configure parts of the PRACH resources used by an ordinary legacy R8/9/10 user equipment (OL UE) for the UE; or configure all of PRACH resources used by the OL UE for the UE.
The eNodeB, which divides preamble sequences into two parts for different UE types, distinguishes UE type based on received preamble, sends PRACH resource information and RAR, and contains a PRACH configuration module, features specific PRACH resource configurations. The configuration module can configure dedicated PRACH resources (frequency, time, preamble sequence); configure a subset of legacy UE PRACH resources for the new UE; or configure all legacy UE PRACH resources for the new UE. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
14. The evolved NodeB of claim 10 , wherein: the position of the PDSCH is indicated by the ePDCCH in a present frame or across frames.
The eNodeB, which divides preamble sequences into two parts for different UE types, distinguishes UE type based on received preamble, and sends PRACH resource information and RAR, has a PDSCH location indicated by the ePDCCH. The position of the PDSCH, carrying data, is signaled by the ePDCCH, either within the same frame or across frames. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
15. The evolved NodeB of claim 13 , wherein: the sending module is configured to: if the PRACH resources are dedicated PRACH resources configured for the UE, after receiving the random access preamble sequence on the PRACH resources, only send an ePDCCH scrambled with a random access radio network temporary identifier (RA-RNTI); if the PRACH resources are parts of the PRACH resources used by the OL UE and configured for the UE, after receiving the random access preamble sequence on the PRACH resources, send the ePDCCH scrambled with the RA-RNTI and the PDCCH scrambled with the RA-RNTI when the random access preamble sequence is shared by the UE and the OL UE, and send the PDCCH scrambled with the RA-RNTI when the random access preamble sequence is exclusively used by the OL UE; if the PRACH resources are all of the PRACH resources used by the OL UE and configured for the UE, then after receiving the random access preamble sequence on the PRACH resources, send the ePDCCH scrambled with the RA-RNTI and the PDCCH scrambled with the RA-RNTI.
The eNodeB, which divides preamble sequences into two parts for different UE types, distinguishes UE type based on received preamble, sends PRACH resource information and RAR, and can configure dedicated/shared PRACH resources, features specific sending module behavior. If the PRACH resources are dedicated, the sending module only sends an ePDCCH scrambled with RA-RNTI. If the PRACH resources are a subset of legacy resources, the sending module sends both ePDCCH and PDCCH scrambled with RA-RNTI if the preamble is shared, or only PDCCH if exclusive. If all resources are legacy, the sending module sends both ePDCCH and PDCCH scrambled with RA-RNTI.
16. A user equipment, wherein preamble sequences in a access cell is divided into two parts, wherein a first part of the preamble sequences is dedicated preamble codes selected for access of a first type of user equipment (UE), and a second part of the preamble sequences are preamble codes selected for access of a second type of UE; wherein the user equipment comprises: a transceiver module, which is configured to receive physical random access channel (PRACH) resource configuration information sent by an eNodeB via a physical downlink shared channel (PDSCH) indicated by a downlink control channel, and after receiving the PRACH resource, select a preamble sequence in the first part of the preamble sequences, and transmit the preamble sequence to the eNodeB on the PRACH resources indicated by the PRACH resource configuration information; wherein according to the received preamble sequence the eNodeB distinguishes a type of the UE sending the preamble sequence; a reading module, which is configured to use a random access radio network temporary identifier (RA-RNTI) to monitor the downlink control channel, and read information carried in a random access response (RAR) sent by the eNodeB from a PDSCH indicated in the monitored downlink control channel; and a data sending module, which is configured to send uplink data to the eNodeB through a physical uplink shared channel (PUSCH) according to the information carried in the RAR; wherein the downlink control channel is an enhanced physical downlink control channel (ePDCCH); or, after receiving a physical broadcast channel (PBCH), the UE determines that the downlink control channel is the ePDCCH or a physical downlink control channel through information carried by the PBCH; alternatively, the UE obtains a system bandwidth, when a long-term evolution (LTE) system bandwidth is less than or equal to a reception bandwidth of the UE, the downlink control channel is a physical downlink control channel, and when the LTE system bandwidth is greater than the reception bandwidth of the UE, the downlink control channel is the ePDCCH.
A user equipment (UE) for an LTE system, where preamble sequences are divided into two groups (one for a first UE type, another for a second UE type), includes a transceiver, a reading module, and a data sending module. The transceiver receives PRACH resource configuration from the eNodeB via a PDSCH indicated by a downlink control channel. It selects a preamble sequence from the first group and transmits it on the configured PRACH. The reading module monitors the downlink control channel with RA-RNTI and reads the RAR from the PDSCH. The data sending module sends uplink data via PUSCH according to the RAR. The downlink control channel is either ePDCCH, determined by PBCH to be ePDCCH or PDCCH, or dynamically switches based on LTE and UE bandwidths.
17. The user equipment of claim 16 , wherein the user equipment further comprises: an accessing module, which is configured to use a temporary cell radio network temporary identifier (C-RNTI) to monitor the downlink control channel, read a contention resolution message from the PDSCH indicated in the monitored downlink control channel, and judge whether the random access of the UE is successful or not according to the contention resolution message, and upgrade the temporary C-RNTI to a C-RNTI if the access is successful.
The UE, which divides preamble sequences into two parts for different UE types, selects a preamble sequence and transmits it, receives PRACH configuration, and sends uplink data, further includes an accessing module. This module monitors the downlink control channel using a temporary C-RNTI, reads a contention resolution message from the PDSCH, and determines if random access was successful. If successful, the temporary C-RNTI is upgraded to a permanent C-RNTI. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
18. The method of claim 2 , wherein: the position of a time domain orthogonal frequency division multiplexing (OFDM) symbol of the ePDCCH in a subframe is a fixed position.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, and the eNodeB returning a contention resolution message to a UE accessing successfully through the PDSCH indicated by the downlink control channel, includes a characteristic of the ePDCCH. The time-domain position of the orthogonal frequency division multiplexing (OFDM) symbol within a subframe for the ePDCCH is at a fixed, predetermined location. This allows the UE to reliably locate and decode the ePDCCH without needing to search across the entire subframe. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
19. The method of claim 2 , wherein: before the eNodeB sends PRACH resources configured for a UE to the UE, the method further comprises: the eNodeB configuring the PRACH resources for the UE.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, and the eNodeB returning a contention resolution message to a UE accessing successfully through the PDSCH indicated by the downlink control channel, includes a preliminary PRACH resource configuration step. Prior to sending PRACH resource information to the UE, the eNodeB first configures these PRACH resources for the UE. This configuration includes specifying the time, frequency, and preamble sequence resources that the UE can use for random access. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
20. The method of claim 19 , wherein: when the downlink control channel is the ePDCCH, the eNodeB configuring the PRACH resources for the UE comprises: the eNodeB configuring dedicated PRACH resources for the UE, wherein the dedicated PRACH resources comprise frequency-domain resources, time-domain resources and preamble sequence resources; the eNodeB configuring parts of PRACH resources used by an ordinary legacy R8/9/10 user equipment (OL UE) for the UE; or the eNodeB configuring all of PRACH resources used by the OL UE for the UE.
The information processing method, where random access preamble sequences are divided into two parts for different UE types and the eNodeB distinguishes UE type based on received preamble, and the eNodeB returning a contention resolution message to a UE accessing successfully through the PDSCH indicated by the downlink control channel, involves configuring PRACH resources for the UE before sending PRACH resources to the UE. When using the ePDCCH as the downlink control channel, configuring PRACH resources involves three options: 1) assigning dedicated PRACH resources (frequency, time, preamble sequence); 2) allocating a subset of PRACH resources used by legacy UEs for the new UE; or 3) allocating all PRACH resources of the legacy UEs to the new UE. The downlink control channel used can be ePDCCH, dynamically selected via PBCH, or dynamically switch between PDCCH and ePDCCH based on LTE and UE bandwidths.
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September 26, 2017
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